The invention discloses a
resistor switching circuit, a storage circuit and a consumable
chip. The
resistor switching circuit is used in the consumable
chip, and comprises a plurality of
resistor switching
branch circuits and a decoder, wherein each resistor switching
branch circuit comprises a switching switch and a resistor which are connected in series into the conducting loop of a
signal wire; the decoder is connected with a data storage module in the consumable
chip, and is used for outputting a switching instruction according to a
signal output by the data storage module to control the switching switch of the corresponding resistor switching
branch circuit to connect the corresponding resistor into the conducting loop of the
signal wire or separate the resistor from the conducting loop of the signal wire, so as to change the resistance value in the conducting loop of the signal wire. The consumable chip comprising the resistor switching circuit is easy to modify, and is suitable for printing image equipment which accesses data of the consumable chip through a
voltage source and current, so as to be convenient to maintain, and improve the recycling efficiency more conveniently.